We Thought We'd Found Aliens — It Was a Dead Star Ticking
Image: NASA/CXC/SAO Somewhere in the northern sky, a collapsed star the size of a city is spinning on its axis once every 1.337 seconds. It...
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A Dead Star Shook Earth's Atmosphere From 50,000 Light-Years Away
A dead star 50,000 light-years away shook Earth's magnetosphere in 0.2 seconds. Magnetars are the most magnetic objects in the universe.